You can operate the link in any of the following speeds and modes with the SUNW, hme device:
100 Mbps, full-duplex
100 BASE-T4 (with external transceiver only)
100 Mbps, half-duplex
10 Mbps, full-duplex
10 Mbps, half-duplex
The 100BASE-T standard, IEEE 802.3u Ethernet Standard, describes these speeds and modes.